#!/usr/bin/env python
# -*- coding: utf-8 -*-

import cv2
import numpy as np

# 读取图片
img = cv2.imread('lena.jpg')

# 构建拉普拉斯金字塔
G0 = img
G1 = cv2.pyrDown(G0)
G2 = cv2.pyrDown(G1)
G3 = cv2.pyrDown(G2)
L0 = G0 - cv2.pyrUp(G1)
L1 = G1 - cv2.pyrUp(G2)
L2 = G2 - cv2.pyrUp(G3)


# 为了输出图片
import sys
sys.path.append('..\\utils') 
import utils
utils.show_img([img,L0,L1,L2],["orignal","L0","L1","L2"],"fig6-15.png")